can I leave out "that" in the sentence ?
1.There is a proverb says,……
2.There is a proverb that says,……

Question

can I leave out "that" in the sentence ?
1.There is a proverb says,……  
2.There is a proverb that says,……

Answer

We cannot leave out that “that” because it is the subject. We can leave out “that” when it is the object, as in “There is a proverb (that) I know.”

Answer

no，if without "that", you have to use "saying" instead of  "says"

Answer

There is a proverb.
The proverb says to be a nice person.

One sentence: There is a proverb that ( = the proverb) says to be a nice person.

Answer

No